﻿namespace org.apache.lucene.analysis.payloads
{
	/*
	 * Licensed to the Apache Software Foundation (ASF) under one or more
	 * contributor license agreements.  See the NOTICE file distributed with
	 * this work for additional information regarding copyright ownership.
	 * The ASF licenses this file to You under the Apache License, Version 2.0
	 * (the "License"); you may not use this file except in compliance with
	 * the License.  You may obtain a copy of the License at
	 *
	 *     http://www.apache.org/licenses/LICENSE-2.0
	 *
	 * Unless required by applicable law or agreed to in writing, software
	 * distributed under the License is distributed on an "AS IS" BASIS,
	 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	 * See the License for the specific language governing permissions and
	 * limitations under the License.
	 */


	using BytesRef = org.apache.lucene.util.BytesRef;


	/// <summary>
	///  Does nothing other than convert the char array to a byte array using the specified encoding.
	/// 
	/// 
	/// </summary>
	public class IdentityEncoder : AbstractEncoder, PayloadEncoder
	{
	  protected internal Charset charset = StandardCharsets.UTF_8;

	  public IdentityEncoder()
	  {
	  }

	  public IdentityEncoder(Charset charset)
	  {
		this.charset = charset;
	  }

	  public override BytesRef encode(char[] buffer, int offset, int length)
	  {
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final ByteBuffer bb = charset.encode(java.nio.CharBuffer.wrap(buffer, offset, length));
		ByteBuffer bb = charset.encode(CharBuffer.wrap(buffer, offset, length));
		if (bb.hasArray())
		{
		  return new BytesRef(bb.array(), bb.arrayOffset() + bb.position(), bb.remaining());
		}
		else
		{
		  // normally it should always have an array, but who knows?
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final byte[] b = new byte[bb.remaining()];
		  sbyte[] b = new sbyte[bb.remaining()];
		  bb.get(b);
		  return new BytesRef(b);
		}
	  }
	}

}